Possible BGP hijack

Beginning at 2021-01-05 16:53:00 UTC, we detected a possible BGP hijack.

Prefix 158.51.100.0/24, is normally announced by AS7843 TWC-7843-BB, US.

But beginning at 2021-01-05 16:53:00, the same prefix (158.51.100.0/24) was also announced by ASN 13487.

This was detected by 112 BGPMon peers.

Expected
Start time: 2021-01-05 16:53:00 UTC
Expected prefix: 158.51.100.0/24
Expected ASN: 7843 (TWC-7843-BB, US)
Event Details
Detected advertisement: 158.51.100.0/24
Detected Origin ASN 13487 (ULTRA-PACKET, US)
Detected AS Path 34224 3356 6461 11877 11877 13487 13487
Detected by number of BGPMon peers: 112

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